you just can't ignore the interplay between biology and environment. >> what about the fact that we talk about the irish or the native american indians. is it a lack of tolerance? is there a term for it? >> no, no, no. there's a genetic factor and an environmental factor. but the bottom line is we know how to deal with this. prevention, prevention, prevention. nine out of ten addicts started when they were teenagers. if the brain is still developing and you hijack it, you're permanently -- >> you don't like these laws legalizing marijuana? >> no, i don't. i think we need the public health community to weigh in here. so we need to be mindful, and not jump into this. >> like joe camel and that kind of stuff. >> exactly. liquor stores. liquor stores are places where people are going to abuse liquor and have easy access. >> this is too hot. the hottest topic in this country right now is gun safety. your family has been victimized. because of your family being victims, we are all victims. what is your feeling? >> it's not just the person that's killed, like my uncles. it's the whole family. s